Advice, weight loss peak, caloric intake q

[Korch]

I'm currently 6'1", 240lb (mostly fat). I currently work out 6-7 times a wk on avg. I do boxing 2-3 days, jogging or hiit 2-3days, and weight lifting 2-3 days on avg. I eat roughly 6 meals a day on a low carb diet (carbs come from nuts and vegtables). I'd estimate I'm taking in 3600-2800 calories/day. Most site say I need around 4500-4700. After losing a ton of weight, it appears I've peaked. I drink a lot on the weekends, but I drank even more in the past and was still able to drop weight.

Some background: I've lost over 100lb over the last year to get to where I am. After peaking for a couple weeks I started taking creatine (3-4wks ago) and doing a bit more weight training. I hear this causes water retention, but making progress is my main goal -- i'm not tied to the scale. I don't think I'm noticably more muscualr.

Any advice?

One point I'd like to hear your comments on is whether my maintenece level is really 4500 calories given that I've got a lot of fat on me, not like a 240lb weight lifter. If so, is my deficit reasonable?